Photographic camera



(No Model.) 3 Sheets-Sheet 1.

J. E. BLACKMORE.

PHOTQGRAPHIG CAMERA.

No. 435,342. I Patented Aug. 26, 1890.

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No. 435,342. Patented Aug. 26, 1890.

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J. E. BLACKMORB.

PHOTOGRAPHIG CAMERA. No. 435,342. n Patented Aug. 26, 1890.

James Zlackmq;

UNITED STATES PATENT OEEIcE.

JAMES E. BLAOKMORE, OF GRAND RAPIDS, MICHIGAN.

PHOTOGRAPH IC CAM ERA.`

SPECIFICATION forming part of Letters Patent No. 435,342, dated August26, 1890.

Application filed August 26, 1889. Serial No. 322,029. (No model.)

To all whom it may concern:

Be it known that I, J AMES E. BLAcKMoEE, a citizen of the United States,residing at Grand Rapids, in the county of Kent and State of Michigan,have invented certain new and useful Improvements in PhotographicCameras; and I do hereby declare the following to bea full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to improvements in` photographic cameras, and moreparticularly to that class adapted to making instantaneousview workwithout removing the camera proper from its outer casing or box in whichit is transported.

The object-s of my invention are to provide said camera with sundryimproved conveniences and devices, as will appear in what follows.

In the accompanying drawings, Figure lis a perspective of adeviceembodying my invention; Fig. 2, a longitudinal vertical section of thesame; Fig. 8, an elevation of the plateholder, with parts broken away;Fig. 4, a vertical section of the same on the line oc of Fig. 3; Fig. 5,a perspective ofthe groundglass frame; Fig. 6, a detail of shutter forsingle objective, and Fig-7 the same of shutter for stereoscopicobjective; Fig. 8, a panel 2O with single objective, and Fig. 9 the samewith double objective.

A is the outer casing or box provided with a handle B for carrying thesame, a door C for inserting and removing the groundglass andplate-holders, a door E in its rear end for observing the image upon theground glass, a detachable front D, having an oblong cap F pivoted tothe same near its middle, and serving to close and open the openings insaid front opposite to objective M, and finderlens G', and also with aninstantaneous shutter, hereinafter described.

20 is a removable panel having an obj ective M at its center, Fig. S,and for which a similar panel having a double objective for stereoscopicwork may be substituted, Fig. 9.

O represents the ground glass, and I? the focus-screw.

H is a strip of metal, which can be observed through the glass plate H.Said strip moves to and from the objective with the ground glass O, andhas marks indicating the proper positions of the same to focus objectslat various distances.

G is a finder consisting of a ground glass, upon which is projected anupright image corresponding to the one on the ground glass O by means ofthe lens G and mirror G. By observing this image on the finder the imageon O can be determined.

The shutter for a single objective consists of a fan-shaped plate R,arranged within a suitable chamber in the front D, having an opening hin the middle of its broader part and pivoted near its outer end tovibrate, as shown by dotted lines. Said shutter is forced downward by aspring L, which is turned around the post L near its middle having onearm attached to said shutter andV the other engaging with notches K inthe plate J to adj ust its tension and determine the speed of theshutter. To the narrow end of said shutter R is pivoted the bars 11 and12, the latter having the lever I projecting from the edge of the front,by means of which the shutter can be set and the former sliding throughthe guide 21 and provided with notches `13 and 14, engaging with thelatch I which also projects outside the edge of the front D. The notchlengages the latch I when the opening M is opposite the objective, andthe notch 14E when the shutter is set ready for exposure.

19 is a buffer to break the shock when the shutter R falls.

For the double or stereoscopic objectives, I provide a front D, having achamber, within which is a rectangular slide R', having openings M Mcorresponding to the objectives, arranged to move between parallel ways15 15 and forced to the left by a spring L, one arm of which engageswith the notches K for the purpose before cited.

1S is a bar pivoted to said slide at one end and at the other to a leverI", extending beyond and projecting from the edge of the front D, bymeans of which the shutter can be moved to the right and set for use.

I is a latch projecting from. the edge of the front and engagingwith"notches 22 and 23 in the plate 17 on the slide R'.

19 is a rubber buffer to break the shock of the shutter.

IOO

In the plate-holder S S are the slides that are withdrawn to expose theplate.

T are the light-valves, arranged in suitable chambers and having hingesUU at their upper edges, and swing outward by the spring 1 to close theslid e-opening.

4 4t are grooves into which the lower edges of the valves strike toinsure exclusion of all the light.

2 is the diaphram which separates the plates.

WV is a slide, having tongues 3 3 engaging with grooves in the holder. Yis a bar oppositely taperingfrom the middle, and having attached aspring Z, which presses against the edges of the plates V. By removingthis slide, bar, and spring the plates can be removed from or insertedin the plate-holder. /Vhen the plates are in position, the bar Y isfirst inserted, and its tapered ends serve as wedges to compress thespring as the slide W is replaced.

The ground-glass frame 5 is of the usual rectangular form, and providedon the inner surface of its respective sides with a groove or chamber 6and a detachable portion 7, having tenons 8 engaged With said groove andsecured in place by screws inserted in holes 9. By removing said screwsand the part 7 the ground glass can be readily removed from the grooves6 or placed therein and secured by replacing the detachable part 7.

What I claim is as follows:

1. In a camera, an outer case inclosing the operating parts of a camera,and provided with a detachable front havinga pivoted cap F, a chamberinclosing a spring-actuated shutter7 the notched plate J, having notchesengaging the spring of said shutter, a finder consisting of a lens G', amirror G, and a ground glass G, afocus-gage I-I, a top door C, and arear door E, substantially as described.

2. In combination with the case A, inclosing` the operating parts of acamera, a detachable front panel7 having a chamber inclosing a shutterR, pivoted in said chamber, having the opening M, actuated by the springL, and having the bars Il and 12, and the leverI and latch projectingfrom the edge of said panel, substantially as described.

3. In a camera, a case inclosing the operating parts, said case having afront provided With a movable shutter, a spring for actuating saidshutter, one end of which spring projects outside of said case andengages a notched plate, a pivoted lever connected to4 said shutter foradjusting the sam e, and a pivoted latch engaginga notched plateattached to said shutter for holding and releasing the latter, saidlever and latch also extending ou tside said case, substantiallyasdescribed.

4. In a camera, in combination with a plateholder having an opening atone side to insert or remove the plates, a slide W', closing saidopening having tongues 3 3 engaging with grooves in the holder, and aspring between said holder and the bar Y, having the spring Z attached,substantially as described.

5. In a camera, in combination with a plateholder having an opening atone side to insert or remove the plates, a slide having tongues 3 3,engaging with grooves in the holder, and a spring between said slide andthe plates S S', said spring adapted to be compressed by the slide whenin place, substantially as described.

6. In a camera, a ground-glass frame having the groove 6 and thedetachable part'7, substantially as described.

7. 'Ina camera, a ground-glass frame having the groove 6 intheinnersurfaceot` three sides, and a removable part 7 in the fourthside provided with screws, substantially as described.

In testimony whereof I aftix my signature in presence of two witnesses.

LUTHER V. MoULroN, JosIAH W. SHnRwooD.

